Friction-gearing for machinery



UNITED STATES PATENT OFFICE.

F. P. DIMIFEL, OF PHILADELPHIA, PENNSYLVANIA.

IFIEtICJIIlON-GEAIREIN'G FOR MACHINERY.

Specification of Letters Patent No. 31,659, dated March 12, 1861.

To all whom it may concern:

Be it known that I, F. P. DIMPFEL, Of the city and county of Philadelphia,in the State of Pennsylvania, have invented a new and useful Improvement in Friction-Gearing for Machinery; and I do hereby declare the following to be a full and exact description of my invention, reference being had to the accompanying drawings and to the letters of reference marked thereon.

In friction gearing, pressure upon the surface is necessary to cause adhesion, and to prevent slipping. As such gearing has been heretofore arranged this pressure has been made to act upon the journals, thus causing much loss of' power and the rapid wearing away Of the journals, and their boxes.

T O Obviate this Objection and also to attain to a much greater economy Of space necessary for the gearing used is the purpose of my present invention.

In the acconipanying drawings Figure l. is a side elevation, Of the contrivance used by me for this purpose. Fig. 2. is a section of the same along the line rc, y, e. Fig. 3. is the same section, showing a` difference Of f orm. Fig. 4. is still another variation Of the same contrivance. Fig. 5. shows a plan of the contrivance as applied to a blower.

For this purpose, I construct a. driving wheel A, having a strong rim Or flange o. Two intermediate pinions Z), and c, having their tread upon the internal surface of this rim, communicate their motion to the center pinion (l, as shown by the arrows attached to those wheels respectively. This center pinion, will, therefore move with a rotary speed, accelerated over that of the driving wheel in an inverse ratio tothe length Of their respective diameters.

The intermediate pinions 7), and c, have stud journals which work in elongated bearings Or slots, as shown at f. The journals of the center pinion work also in slots g, the

center line of each of which bisects the angle ac, y, e.

The weight of this center pinion and of the shaft Or other machinery which is supported by it, will generally be sufficient to produce all the pressure upon the interme diate pinions b, and c, which will be found necessary.

When it is desirable to increase the friction, a spring may be used as shown at- 7L.

The angle a2, y, e, being very obtuse, gives to the center pinion, the power of a wedge, and the niore obtuse that angle is made, the greater will be that power. But, however great it may be, the whole will be thrown upon the rim of the driving` wheel, and the friction upon none of the journals will be thereby increased, as the slots in which those journals work, permit all the pinions to adapt themselves freely tO any amount of pressure which may be brought upon their respective surfaces.

By placing the pinions within the circumference of the driving wheel a great economy Of space is attainedand the bite or hold which is thus given to the intermediate pinions upon the driving wheel is much greater than though the contact was external. The simplicity Of the arrangement also prevents much loss of power, more especially as the journalsare almost entirely exempt from friction.

IlVhen it is desirable to give the several pinions a greater bite Or hold upon each other and upon the driving wheel, the tread instead Of being plain as shown in Fig. 2, may be corrugated as represented in Fig. 3, with One Or several corrugations, or, instead of the plan above described, the center pinion may be made in two parts (Z and cl', the former of which is made fast and the latter' made adjustable by means of a nut 2' and spring 71;, or other equivalent means.

The arrangement above described will be found peculiarly advantageous for high geared machinery, or, where great economy Of space is desired, as in the propelling of blowers On board of steamers, when the driving engine M, is attached directly tO the driving wheel A, as shown in Fig. 6.

IVhat I claim as my invention and desire to secure by Letters Patent, is"

l. The application and use of friction gearing, constructed and arranged in the manner and for the purpose above described.

2. The above described arrangement in combination with a blower for the purpose of economizing space and power.

F. P. DIMPFEL.

Witnesses W. THOMPSON, Crus. MASON. 

